Is Terror Ballista legal in Standard, Modern, and Commander?

Terror Ballista is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Terror Ballista?

Terror Ballista is an Artifact Creature — Construct. Its oracle text reads: "Menace Whenever this creature attacks, you may sacrifice another creature. When you do, destroy target creature an opponent controls. Unearth {3}{B}{B} ({3}{B}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.) Power/Toughness: 5/3"

Terror Ballista

Artifact Creature — Construct

Menace

Whenever this creature attacks, you may sacrifice another creature. When you do, destroy target creature an opponent controls.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)